Water-tube boiler



No. 749,129. PATBNTBD JAN. 5, 1904.. e. R. F! H. OUNTZ.

WATER TUBE BOILER.

APPLICATION FILED MAR. 1a. 1903.

I r j 4 SHBETS-SHEHT 1 H0 MODEL.

PATENTED JAN. 5, 1904.

.G.- R. F. H. GUNTZ. WATER TUBE BOILER.

APPLIOATIOJN FILED In. 13. 1903.

4 SHEETS-SHEET 2.

H0 MODEL.

, ll Ir malt v No, 749,129. PATENTED JAN. 5, 1904. G, R. IE. H. GUNTZ.WATER TUBE BOILER.-

APPLICATION FILED MAR. 13. 1903.

10 MODEL. 4 SHEETS-slimm- 3.

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rm: NORRIS PETERS my PnpTo-ufnm WASHINGTON, 0.1:,

' No."749,129. PATENTED JAN.V5, 1904.

- G. R. RH. GUNTZ.

WATER TUBE BOILER.

APPLICATION FILED MAR. 13. 1903.

N0 MODEL. 4 SHEBTESHEET 4- UNITED STATES Patented January 5, 1904.

PATENT OFFICE.

GREGOlEt RUDoLE F DINA D HEINRIoH OUNTZ, E HAMBURG, GERMANY, AssIeNoR 0FON -HALE TO oHARLEsM. BARNETT AND CHARLES J.

HAReREAVEs, OF NORFOLK, VIRGINIA.

WATERI-TUBE'BOILER.

SPECIFICATION formingpart of Letters Patent No. 749,129, dated January5, 19Q 4.

Application filed March 13, 1903.

T0 at whom it may concern.-

Be it known that I, GREGOR RUDoLE FER- DINAND HEINRICH OUNTZ, a subjectof the Emperor of Germany, residing atHamburg,

Germany, have inventednew and useful Improvements in Water-Tube Boilers,of whic the following is a specification.

This invention relates to Water-tube boilers; and the objects andadvantages will be set forth at length in the following description,while the novel features of said invention will constitute the basis ofthe claims succeeding said description.

.In the drawings accompanying and forming part of this specification,Figure l is a' front elevation of my improved boiler with parts brokenaway and one of the doors open to show theinterior. Fig. 2 isa verticalcentral sectional elevation of said boiler. Fig.

3 is a side elevation of the same. Fig. 4 is a detail sectionalelevation, on an enlarged scale, of a water -tube and inolosed fiue.Figs. 5 and 6 are front and rear elevations of the same. Fig.7 is a sideelevation of said water-tube with a. group of the tubularfiues'partially removed therefrom. Fig. 8 is a perspective view of a platecomposing part of the front and rear Wallsin the combustionc-hamber-ofthe apparatus. Fig. 9'is a detailin sectional plan view, showing asliding door adapted normally to cover a manhole through which accessmay be had through the sides of the boiler to the water-tubes.

In the drawings like characters refer to like parts throughout theviews.

The numeral 2 denotes the setting or housing'of theimproved boiler,which may be of any suitable material, shape, or size, and it incloses afire-box 3, having a grate upon 0 which the-"fuel is to be burned andbeneath which is'arranged the usua'l-ash-pit, such fuel being introducedin a well-known manner. The fuel may be of any desired kind. Above'thefire-box is a combustion-chamberet,- in which the water-tubes 5 arelocated.

Serial No. 147,626. (No model) for this purpose. The water-tubes aresupported at or near their fronts and rears by the walls 6 and 7. Thesewalls 6 and'7, it will be seen, are separated from the correspondingwalls of the setting or housing 2 in order to provide chambers 8 and 9,through which the products of, combustion or hot gases from thefire-box3 are adapted to pass to thereby reach the tubular fluesiuclosed by the respective water-tubes, as will hereinafter appear.

The front and rear walls 6 and 7, respectively, consist of superimposedplates suitably fastened between the side walls of the furnace in suchmanner that any one or more of them may be taken out in case it isdesired to dismount a water-tube or a number of them. In the presentcase tie-rods 10 pass through the plates of the respective walls andconstitute a simple means for removably assembling them together. Thepresence of the said Walls 6 and 7 provides an intermediate chamber 10,in which the Water-tubes are located, the under side of the spaceopening directly into the fire-box, whereby the products of combustionfrom the latter ascending can traverse said intermediate chamber 10 inorder to externally heat the water-tubes. To provide for aJcircuitouscourse of such products of combus- 8o tion through the intermediatechamber 10, whereby the same can thoroughly externally heat the tubes,staggered bafflerp'lates 11 are arranged within the said space. Thelowermost baffle-plate is connected with the front wall 6 and the nextuppermost one with the rear wall, such disposition being repeatedthroughout the series, whereby openings are provided between the freeedges of the baffleplates and'the' adjacent walls 6 and 7 for thepassage of the hot gases or products of combustion. v

' The water-tubes are joined at their opposite ends by couplings 12, andthe uppermost ones are similarly connected to transverse 5 tubes 13above the water-tubes at the front and rear of the device, whichtubes'l3 are connected by suitable piping with the steamdrum 14 abovethe same. The feed-water is supplied through the connecting-pipe be- [00tween the rear tube 13 and drum, such water passing from said rear tube13 into the watertubes, through which it circulates, returning by way ofthe front transverse tube 13 to the steam-drum, it being heated duringits passage through the tubes by heat applied externally to said tubesand also by heat radiating from tubular flues, hereinafter described,inclosed by the water-tubes. As the tubular fines in question areinclosed by the water-tubes, and as the latter by radiation heat thewater in said water-tubes, I am enabled to secure the highest possibleefliciency from the hot gases which ascend from the firebox 3. In otherwords, I secure a greater space exposed to the hot gases than hasheretofore been possible.

Each water-tube 5 incloses a group of connected tubular fines, eachdenoted by 15, and which areshown as straight. The ends of these tubularfines are connected to the disks or heads 16, which closely fit thewater-tubes and are located near the opposite ends of the latterandwhich close the opposite ends of the water-tubes against theadmission of the products of combustion and also prevent the escape ofwater therefrom. What is shown as being the rear disk or head is adaptedto fit against a shoulder at the corresponding end of the water-tube,the front disk fitting against a collar or ring 17, threaded into thecorresponding end of the tube and which, it will be evident, isremovable. The disks 16 close the opposite open ends of the tubes 5against the admission of the products of combustion. As the tubes,however, are open at their opposite ends, a scraper can be readilyintroduced from either open end of the same in order to clean the same.As the tubes are straight, this result can be very easily accomplished.

Should any one of the tubes be broken, a rod or bar can be passed intothe said broken tube through either open end thereof without drawing thefire, the rod when in place being adapted to receive nuts or the like atits opposite ends. In this way leakage through a broken tube into thecombustion-space can be readily prevented. In steam-boilers havingWater-tubes arranged in a cluster and of curved form it is necessary, toremove or clean any one of them, to take out the whole cluster or group.This difiiculty, as will be obvious, I wholly overcome. The arrangementdescribed is also comparatively light, which is animportantconsideration in marine steam-boilers.

Should it be desired to clean the exteriors of any group of fines 15 andthe inside of the water-tube inclosingthe same, this result may byreadily accomplished by removing the appropriate collar 17 by aid of aspanner, the

said collar being slotted to permit of the application of such animplement, after which the group of tubes as a whole can be readilywithdrawn from the water-tube and scraped by a suitably-shaped knife orthe like, and

the interior of the tube, which is then free of the fines, can bescraped in like manner to remove accumulations of mud, sediment, orother objectionable matter. The lowermost tubes are connected by apiping of some suitable kind with a mud-drum 18, the discharge end ofwhich projects through an opening in a side wall of the setting 2.

The opposite open ends of the tubular flues 13, it will be seen, openinto the outer chambers 8 and 9 for a purpose that will now appear. Therear wall 7 does not extend the complete height of thecombustion-chamber 4, whereby the products of combustion after pursuinga tortuous course through the inner or intermediate cham ber 10 canleave the same through the upper rear side thereof and enter the rearchamber 9, so that they can enter what might be considered the inlet orrear ends of the respective fines and traversing said flues leave thesame and enter the chamber 8 at the front side of the boiler, passingfrom thence into a suitable stack. To provide for the best circulationof the products of combustion through the tubular fines, the front endsof the water-tubes 5 are slightly elevated.

To insure that the products of combustion from the fire-box will enterthe lowermost tubes 15, an opening 19 is provided at the lower side ofthe rear wall 7, whereby such products of combustion can pass from thefirebox directly into the rear chamber 9,'at the lower side thereof,tosecure the result in question, and in order to properly guide suchproducts of combustion into such rear chamber an inwardly and downwardlyinclined directingplate depends from the lower edge of said opening. 7

The front and rear walls of the setting are each provided withcomplemental hinged doors 21, which can be opened to obtain access tothe chambers 8 and 9 for the repairs of the tubular fines, for scrapingthe same, or for otherpurposes, while the sides of the housing havesliding doors 22, by opening which the couplings between the water-tubescan be reached in order to facilitate the removal of said tubes. Thesedoors and the adjacent inner sides of the setting are preferably linedwith fire-brick.

The invention is not limited to the exact construction hereinbeforedescribed, for material variations may be ad opted as to many feat nresof my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination in a water-tube boiler, of a setting, a fire-box andwalls in said setting, the walls dividing the interior of the settinginto intermediate and frontand rear chambers, the front wall serving toshut 01f communication between the intermediate chamber and the frontchamber, a plurality of communicating water-tubes supported by saidwalls, the rear wall extending short of the top of the setting andhaving an opening at its lower end affording communication between thefire-box and the rear chamber, and tubular flnes inclosed by thewater-tubes, communicating with said front and rear chambers.

2. The combination in a water-tube boiler, of a setting, a fire-box andwalls in said setting, the walls dividing the interior ofthe settinginto intermediate and front and rear chambers, the front wall serving toshut off communication between the intermediate chamber and the frontchamber, a plurality of communicating water-tubes supported by saidwalls, the rear wall extending short of the top of the setting andhaving an opening at its lower end affording communication between thefire-box and the rear chamber, tubular flues inclosed by thewater-tubes, communicating with said front and rear chambers, andstaggered baffle-plates in the inter? mediate chamber.

3. The combination in a water-tube boiler, of a setting, a fire-box andwalls in said setting, the walls rising from a plane above saidfire-box, dividing the interior of the setting into intermediate andfront and rear chambers, the front wall serving to shut off directcommunication between the intermediate chamber'and the front chamber, aplurality of communicating water-tubes supported by said walls, the rearwall extending short of the top of the setting and said rear wall havingan opening affording communication between the fire-box and the rearchamber, and the upper side of said opening having a downwardly andinwardly inclined directing-plate extending toward the fire-box, andtubular flues inclosed by the water-tubes, communieating with said frontand rear chambers.

4. A water-tube boiler having a fire-box and a com bustion-chamber, aplurality of com municating water-tubes in the com bustion-chamber,walls for supporting the fronts and rears of the water-tubes to provide,a chamber between the same and at the front and rear of said tubes, therear chamber being in communication with the intermediate chamber, andsaid walls consisting of superimposed removable sections, and tubularfines inclosed by the water-tubes, opening into said front and rearchambers.

ting, the walls rising from a plane above said fire-box and dividing theinterior of the setting into intermediate and outer chambers, one wallserving to shut ofidirect communication between the interior chamber andthe adjacent outer chamber, and said other outer chamber and theintermediate chamber being in direct communication with the firebox, apluralityof communicating water-tubes supported by said walls, each ofthe latter consisting of detachably-mounted sections, and tubularfluesinclosed by the water-tubes, communicating with said outer chambers.

6. A water-tube boiler havinga fire-box and a combustion-chamber, aplurality of communicating water-tubes in the combustion-chamber, wallsfor supporting the fronts and rears of the water-tubes to provide achamber between the same and at the front and rear of said tubes, therear chamber being in communication with the intermediate chamber, andsaid walls consisting of detachablymounted sections and a group oftubular flues removably inclosed by each water-tube, and

opening into said front and rear chambers, respectively.

7. In a water-tube boiler, awater-tube, a plurality of tubular fiuestherein, disks to which the opposite ends of the fines are connected,the water-tube having a shoulder at one end against which one of thedisks bears, a collar removably fitted in the opposite end of thewater-tube and bearing against the other disk, the disks closing theopposite open ends of the water-tube, and the opposite ends of the fluesbeing open.

8. In a water-tube boiler, a water-tube, a plurality of tubular finestherein, disks to which the opposite ends of the fines are connected,the water-tube having a shoulder at one end against which one of thedisks bears, and a collar fittedin the'opposite end of the water-tn beand bearing against the other disk, said collar being screw-threadedinto the tube, the disks closing the opposite open ends of thewater-tubes, and the opposite ends of the fines being open.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

GREGOR RUDOLF FERDINAND HEINRICH GUNTZ.

Witnesses:

HEATH SUTHERLAND, GEO. W. REA.

